Automatic network assembly

ABSTRACT

Some examples provide a method for automatic network assembly. The following instructions may be used to implement automatic network assembly in a modular infrastructure. Instructions to automatically connect a management port to a management network. Instructions to automatically connect link ports to form a scalable ring. Instructions to automatically connect each modular infrastructure management device to a bay management network port.

BACKGROUND

Converged infrastructure includes servers, storage, networking, andintegrated software and services. These systems are designed to addressthe cost and complexity of data center operations and maintenance bypulling the IT components together into a single resource pool so theyare easier to manage and faster to deploy.

DRAWINGS

FIG. 1 illustrates an overview of a system for automatic networkassembly infrastructure management devices according to an example.

FIGS. 2-3 illustrate infrastructure management devices to performautomatic network assembly according to examples.

FIG. 4 illustrates an infrastructure network for automatic networkassembly according to an example.

FIG. 5 illustrates a schematic view of infrastructure management devicesconnected to one another and a management network according to anexample.

DETAILED DESCRIPTION

Converged infrastructure systems provide a single resource pool for ITcomponents together into a solution that is easier to manage and fasterto deploy. As part of the solution, the management network fabricprovides for the connectivity of the infrastructure allowing the overallsolution to be managed. A key challenge in setting up and administeringconverged infrastructure is that the infrastructure cannot be managedbefore the management network fabric itself is assembled and fullyfunctional. Manually setting up a network fabric is time consuming anderror prone as this requires much information regarding all theconnected infrastructure elements, how they are connected, andconfiguration of network protocols and network security. All of thisinformation must be accurately programmed into the infrastructurecomponents before use. Discovery, assembly, and full functionality of aconverged infrastructure network fabric in an automated manner isprovided herein.

Converged infrastructure hardware must be physically setup based ondesign requirements and desired capacities. For example, a set ofservers and storage within a set of racks must all be connected withpower and network connectivity for some desired topology. The desiredtypologies are based on the customer workloads to be run on top of theinfrastructure and can include preferences for performance and/or highavailability. After the infrastructure has been installed and cabled,software configurations must be applied to the network fabric andinfrastructure within. Existing computer systems with heterogeneous orhomogeneous enclosures containing servers, networking, storage, and/orsystem management require extensive manual configuration of IPaddresses, and login credentials for every node before managementnetwork communications is operational. In addition the switches thatconnect all the enclosures must all be configured prior to anyproduction network communications between any of the nodes in thesystem. These manual configuration prerequisites may require setup bydifferent people based on roles and responsibilities for administrationof servers versus storage or networking equipment.

For example, manual processes are difficult, tedious and error prone.Many of the setup and configuration steps require manual interventionand deep knowledge about the network fabric specifics, especially whenerrors or anomalies exist. This is both time consuming and error prone.Some automation tools exist but these are not well integrated into theoverall solution. Additionally, manual processes often result inincorrect setup of hardware. A management network fabric is physicallysetup to connect servers, storage and up-links into the customer's datacenter. The resultant manual setup is complex and error prone. In thesecases, customers are confronted with complex physical network fabricchanges which may require help from the network vendor or a networkadministrator with deep knowledge. This results in down time andunrealized infrastructure. The network device, system, and methodsherein can pin-point anomalies and errors automatically and suggestappropriate corrective action.

The infrastructure management device, system, and machine-readablestorage medium herein automate these steps through automatic networkassembly, which dramatically reduces the setup time for a single ormultiple enclosure computer system by eliminating the requirement ofconfiguring individual network addresses for each node and configuringnetwork switches to create the system communication between all nodesand enclosures. No network IP address configuration is required on anynode except configuring one routable IP address for remote access to aninfrastructure management appliance. The automatic network assemblyusing infrastructure management devices can also provide automatic faulttolerant connectivity to all the nodes and all the enclosures, whichprotects the computer system against failure of a switch or failure of anetwork cable.

Examples of a method for automatic network assembly is provided herein.The method includes instructions to implement automatic network assemblyin a modular infrastructure. Instructions to automatically connect amanagement port to a management network. Instructions to automaticallyconnect link ports to form a scalable ring. Instructions toautomatically connect each modular infrastructure management device to abay management network port.

FIG. 1 illustrates an overview of a system for automatic networkassembly infrastructure management devices according to an example.System 100 may be implemented in a number of different configurationswithout departing from the scope of the disclosed examples. In FIG. 1,system 100 includes a first infrastructure management device 120, a setof modular infrastructure components 140, a management network 150, anda management switch 180 for connecting first infrastructure managementdevice 120 with modular infrastructure components 140, managementnetwork 150, and/or a second infrastructure management device 130.

For example, modular infrastructure components 140 may include aninfrastructure management device 120, a compute device 141, aninterconnect 145, an appliance 143, and a storage device 147. Components140 are connected through a management switch 180 on an infrastructuremanagement device 120, in addition to component 140 out-of-bandconnections to every bay using redundant controller area network busses.Bay presence signals are detected and bay information is retrieved fromcontroller area network microcontrollers for all bays. This bayinformation indicates to infrastructure management devices 120, 130 theprotocol used to manage that bay. Interconnects 145 and storage devices147 may use out-of-band messages to communicate management networkparameters such as IP address or credentials. Compute devices 141 may bediscovered over the management network 150 using Simple ServiceDiscovery Protocol (SSDP). Appliances 143 may be discovered over themanagement network 150 using Link Layer Discovery Protocol (LLDP). Ifthe component credentials are also learned during the discovery, and ifall components on the management network 150 use IPv6 link local IPaddresses, the first infrastructure management device 120 canautomatically use higher level network protocols like TCP/IP toestablish management network communications with every modularinfrastructure component in the modular infrastructure connected tomanagement switch 180 without any need for manual setup.

Management network 150 provides connectivity to modular infrastructurecomponents 140 from outside or external.

The arrangement illustrated in FIG. 1 is simply an example, and system100 may be implemented in a number of different configurations. Forexample, while FIG. 1, shows one set of modular infrastructurecomponents 140, connected to management network 150 and optionally toanother or second infrastructure management device 130. System 100 mayinclude any number of components 141, 143, 145, 147, and 120, as well asother components not depicted in FIG. 1. System 100 may also omit any ofcomponents 141, 143, 145 or 147.

FIGS. 2-3 illustrate infrastructure management device components toperform automatic network assembly according to examples. Referring toFIG. 2, infrastructure management device 120 is illustrated. In certainaspects, infrastructure management device 120 may correspond to multipleinfrastructure management devices 120 of FIG. 1, such as a primary andredundant infrastructure management device illustrated in FIG. 4.Infrastructure management device 120 may be implemented in various ways.For example, infrastructure management device 120 may be a specialpurpose computer, a server, a mainframe computer, a computing deviceexecuting instructions that receive and process information andaggregates compute, storage, and fabric resources. In the example shownin FIG. 2, infrastructure management device 120 may include amachine-readable storage medium 250, a processor 270, a managementswitch 180, and an interface 280.

Processor 270 may be at least one processing unit (CPU), microprocessor,and/or another hardware device to execute instructions to performoperations. For example, processor 270 may fetch, decode, and executeautomatic network assembly instructions 260 (e.g., instructions 262,264, and/or 266) stored in machine-readable storage medium 250 toperform operations related to examples provided herein.

Interface 280 may be any device that facilitates the transfer ofinformation between infrastructure management device 120 and othermodular infrastructure components, such as compute devices 141,appliances 143, interconnects 145, and storage devices 148; managementnetwork 150. In some examples, interface 280 may include a networkinterface device that allows infrastructure management device 120 toreceive and send data to and from network 180. For example, interface280 may retrieve and process data related to automatic network assemblyfrom via network 180.

Machine-readable storage medium 250 may be any electronic, magnetic,optical, or other physical storage device that stores executableinstructions. Thus, machine-readable storage medium 250 may be, forexample, memory, a storage drive, an optical disc, and/or the like. Insome implementations, machine-readable storage medium 250 may benon-transitory, such as a non-transitory computer-readable storagemedium, where the term “non-transitory” does not encompass transitorypropagating signals. Machine-readable storage medium 250 may be encodedwith instructions that, when executed by processor 270, performoperations consistent with the examples herein. For example,machine-readable storage medium 250 may include instructions thatperform operations that automatically assemble networks withinfrastructure management devices. In the example shown in FIG. 2, themachine-readable storage medium 250 may be a memory resource that storesinstructions that when executed cause a processing resource, such asprocessor 270 to implement a system to perform automatic networkassemble. The instructions include automatic network assemblyinstructions 260, such as instructions 262, 264, 266.

Instructions 262 may function to automatically connect a management port112 to a management network. For example, when instructions 262 areexecuted by processor 270, instructions 262 may cause processor 270 ofinfrastructure management device 120, and/or another processor toconnect a pair of management ports 112 to a management network.Instructions 262 may also function to connect a pair of management ports112 connected to datacenter switch to a management ring and requireconnection for infrastructure management devices in same bay as anappliance. The management ports 112 have automatic active and standbyroles to prevent network loops. The management ports 112 are controlledby the ring owner to prevent loops on datacenter switches. Loopprevention may be based on ITU G.8032 standard, with additionalinstructions for automatic ring owner selection. The ring enables highavailability and tolerates single cable or infrastructure managementdevice faults. Management ports 112 provide high availability ofconnection to datacenter switches and automatic uplink speeds of, forexample, 10 Gb or 1 Gb.

Instructions 264 may function to automatically connect link ports toform a scalable ring management network. For example, when instructions264 are executed by processor 270, instructions 264 may cause processor270 of infrastructure management device 120, and/or another processor toconnect link ports 114, 237 to one another via an internal link on amidplane and an external link to form a scalable ring. Internal linkports 237 include an internal link to connect two infrastructuremanagement devices in the same modular infrastructure via an internallink on a midplane. External link ports 114 include external links toconnect to two separate infrastructure management devices and cannot beconnected to datacenter switches but can only be connected to anotherlink port. Additionally, external link ports 114 are disabled when aneighboring pair of link ports have different system owners.Additionally, the management network ring may automatically provisionprivate VLANs for private communications between nodes within the ring.For example, the scalable ring may include an embedded, scalable 10 GBmanagement network and use software to manage compute, storage, andfabric resources. Examples of the management ports 112, link ports 114,237, and management software are illustrated in FIGS. 4-5.

Instructions 266 may automatically connect each modular infrastructurecomponent 140 to a bay management network port. For example, wheninstructions 266 are executed by processor 270, instructions 266 maycause processor 270 of infrastructure management device 120, and/oranother processor to connect each modular infrastructure component 140to either a primary infrastructure management device 422 or a redundantinfrastructure management device 424 via that device management switch180 for automatic network connectivity and fault tolerance. Modularinfrastructure components 140 communicate via a device protocol, such asa link level discovery protocol. Examples of the steps involved inproviding automatic network assembly are described in further detailbelow with respect to, for example, FIGS. 4-5.

Referring to FIG. 3, infrastructure management device 120 is illustratedto include a management engine 362, a link engine 364, a componentengine 366, and a management switch. In certain aspects, infrastructuremanagement device 120 may correspond to infrastructure management device120 of FIGS. 1-2. Infrastructure management device 120 may beimplemented in various ways. For example, infrastructure managementdevice 120 may be a computing system and/or any other suitable componentor collection of components that provide automatic network assembly.

Management Switch 180 may be any device that facilitates the transfer ofinformation between infrastructure management device 120 and internal orexternal components of the system 100. In some examples, managementswitch 180 may be located within infrastructure management device 120 toreceive and send data to and from a network 140. For example, managementswitch 180 may retrieve and process data related to automatic networkassembly.

Engines 362, 364, and 366 include hardware and/or combinations ofhardware and programming to perform functions provided herein. Moreover,the modules (not shown) can include programming functions and/orcombinations of programming functions to be executed by hardware asprovided herein. For example, the instructions for the engines may beprocessor-executable instructions stored on a non-transitorymachine-readable storage medium and the hardware for the engines mayinclude a processor to execute those instructions. In some examples, thefunctionality of engines 362, 364, and 366 may correspond to operationsperformed by infrastructure management device 120 of FIGS. 1-2, such asoperations performed when automatic network assembly instructions 260are executed by processor 270. When discussing the engines and modules,it is noted that functionality attributed to an engine can also beattributed to the corresponding module and vice versa. Moreover,functionality attributed to a particular module and/or engine may alsobe implemented using another module and/or engine.

In FIG. 3, management engine 362 may represent a combination of hardwareand instructions that perform operations similar to those performed whenprocessor 270 executes instructions 262. Similarly, link engine 364 mayrepresent a combination of hardware and instructions that performoperations similar to those performed when processor 270 executesinstructions 264, and component engine 366 may represent a combinationof hardware and instructions that perform operations similar to thoseperformed when processor 270 executes instructions 266.

FIG. 4 illustrates an infrastructure network 400 for automatic networkassembly for system 100 according to an example of a single modularinfrastructure. FIG. 5 illustrates a schematic view 500 of system 100comprised of multiple modular infrastructures with infrastructuremanagement devices 120 connected to one another and a management network540 according to an example. Referring to FIGS. 4-5, modularinfrastructures, such as 590, 595, 599, include a set of modularinfrastructure components 140, such as a set of compute devices 141, aset of interconnect modules 145, a set of storage devices 147, and a setof appliances 143, each network connected to the primary and redundantinfrastructure management devices 422, 424 via the midplane 578 ofmodular infrastructures. The modular infrastructure components 140 mayautomatically discover one another using a protocol, such as a LinkLayer Discovery Protocol (LLDP) or out-of-band protocol. Infrastructuremanagement devices 422, 424 may automatically discover compute modulesor other devices over the management network using a Simple ServiceDiscovery Protocol (SSDP).

Modular infrastructures also includes a pair of infrastructuremanagement devices 422, 424 that connect one or more external managementports 2112 to a management network and connect a set of link ports 114to one another (e.g., pair of internal link ports 237 to one another viathe midplane 578, and external link port 114 of the pair of link portsto an external link port 114 on another modular infrastructure 120) toform a scalable ring. Loop prevention is provided with automatic ringowner election on the scalable ring formed by connecting multiplemodular infrastructure external link ports 114 in a ring. For example,loop prevention is provided using ITU G.8032 standard, with automaticselection of a ring owner that controls all the link ports on themanagement network ring to prevent a network loop. The ring ofmanagement network link ports provides a scalable management networkbackbone. The link ports can only be connected to other link ports, notto datacenter switch ports.

Infrastructure management device 422 communicates with infrastructuremanagement device 432 within another modular infrastructure through theexternal link ports 114 using network information that includes a linklevel discovery protocol (LLDP) IPv6 local level cluster IP address andother modular infrastructure information. The link ports enablemanagement network communication between modular infrastructures. Linkcabling a new modular infrastructure into the ring results in eitherautomatically adding it to the ring or blocking it from the ring basedon its advertisement of association with the same system manager, noassociation, or a different system manager. If one of the external linkports 114 receives an LLDP message that advertises association with adifferent system manager, then that link port is disabled. In otherwords, ring communications are disabled between modular infrastructureswhen they advertise system managers.

Modular infrastructures may also include appliance 143 that uses systemmanager software to manage compute 141, storage 147, and fabricresources, such as interconnect 145 connected to the modularinfrastructures via the management network. A set of controller areanetwork microcontrollers 449 that are located in each component of themodular infrastructure. The infrastructure management device 120 detectsbay presence signals and retrieves bay field replacement units fromcontroller area network microcontrollers 449 for the set of baymanagement network ports connected to the management switch 180. Inessence, the set of controller area network controllers 449 provideinstructions to the infrastructure management device 120 for the networkrequirements of each of the modular infrastructure bays. Theinfrastructure management device 120 may construct a restful informationservices model based on controller area network microcontroller 449message block information for some of the modular infrastructurecomponents. The system 100 may use in band network protocols orout-of-band methods such as controller area network messages formanagement network discovery.

Referring to FIG. 5, a system 500 is illustrated to includeinfrastructure management devices 422, 424 with an external managementport 112, an internal link port 237, an external link port 114, and aset of bay management network ports 450 connected to compute devices141, storage devices 147, interconnects 145, and appliances 143. Theexternal management port 532 to connect the infrastructure managementdevice to a management network 540. The internal link port 237 toconnect the infrastructure management device 120 to the internal linkport 539 of the redundant infrastructure management device in the samemodular infrastructure. Internal link ports 237/539, 568/569, and587/589 are connected on a midplane 578. External link ports 536,538,connect infrastructure management devices 422, 424 to anotherinfrastructure management device (such as 561, 563, 582, or 583) viaanother external link port 566, 568, 586, 588 on another infrastructuremanagement device (such as 561, 563, 582, or 583). Connections betweenall the external link ports 536, 538, 586, 588, and through all theinternal link ports 237/539, 568/569, and 587/589 form a managementnetwork ring. Either management port 532 or 562 is active and connectsall the nodes in system 500 to the management network 540, while theother port is standby and can be automatically enabled if a fault isdetected on the active management port for automatic fault tolerance.Management ports 534, 564, 582, 584 are not connected to managementnetwork 540 in this example.

FIGS. 4-5 illustrate configurations useable with automatic assembly ininfrastructure management devices, such as 120, 130, 422, 424, 561, 563,581, and 583. Automatic assembly enables connectivity in a single ormultiple enclosure computer system to be instantiated without any userconfiguration by simply network cabling the enclosures together.Computer systems can be comprised of heterogeneous or homogeneousenclosures containing servers, networking, storage, and/or systemmanagement nodes. Automatic network assembly of a homogeneous orheterogeneous set of enclosures comprising a computer system requiresnetwork switches designed to provide communications between all nodeswithout user settings. Network switches may also automatically allowincreasing or decreasing the size of the computer system by simplycabling in new enclosures to the network switches. Network switches mayalso provide automatic fault tolerance at an enclosure level, where asingle network switch failure or single network cable failure isautomatically detected and network communication is rerouted around thefault without impacting any node communication. Network switches mayalso provide fault tolerant communication paths to every node, so thatsingle network switch failure is automatically detected and networkcommunication is rerouted around the fault without impactingcommunication to any node

The size of modular system 500 is determined by all frames that arelinked together. For example, modular system 500 is scalable up to 21frames, which means the modular system 500 can handle hundreds ofcompute and storage modules and manage scalable multi-frame fabrics.Modular system 500 also includes high availability and embeddedmanagement. Automatic assembly works once frames are linked in a ring,with for example CAT6 cable and connected to a 10 Gb management backbonefabric. Two appliances 143 manage dozens of frames, two infrastructuremanagement devices 422, 424, 561, 563, 581, 583 protect each frame, anda front panel 510 has a keyboard, video, mouse (KVM) 512 and laptop port514 connected to an infrastructure management device 422 to provide aninfrastructure management console 516. For example, an installer plugsinto the front panel console in frame with an appliance, clicks “Connectto Management Software”, and then clicks “Hardware Setup.” Activeinfrastructure management device which control front panels connects toappliance system manager URL. Appliance 143 takes the active role andbegins automatic discovery using the LLDP from the infrastructuremanagement device 120 and claims the infrastructure management device.Appliance 143 then traverses the infrastructure management device 422restful data model to discover all the bays and claim them (frame 590),plus adjacent frames 595, 599 and repeats this process following theexternal links around the management ring until back to the originalframe 590.

The disclosed examples may include systems, devices, computer-readablestorage media, and methods for generating a natural language programmingtool. For purposes of explanation, certain examples are described withreference to the components illustrated in FIGS. 1-5. The functionalityof the illustrated components may overlap and may be present in a feweror greater number of elements and components. Further, all or part ofthe functionality of illustrated elements may co-exist or be distributedamong several geographically dispersed locations. Moreover, thedisclosed examples may be implemented in various environments and arenot limited to the illustrated examples.

Moreover, as used in the specification and the appended claims, thesingular forms “a,” “an,” and “the” are intended to include the pluralforms as well, unless the context indicates otherwise. Additionally,although the terms first, second, etc. may be used herein to describevarious elements, these elements should not be limited by this terms.Instead, these terms are used to distinguish one element from another.

Further, the sequence of operations described in connection with FIGS.1-5 are examples and are not intended to be limiting. Additional orfewer operations or combinations of operations may be used or may varywithout departing from the scope of the disclosed examples. Thus, thepresent disclosure merely sets forth possible examples ofimplementations, and many variations and modifications may be made tothe described examples. All such modifications and variations areintended to be included within the scope of this disclosure andprotected by the following claims.

What is claimed is:
 1. A system comprising: a first modularinfrastructure including: a plurality of infrastructure components, eachincluding a set of controller area network microcontrollers; a midplane;a plurality of infrastructure management devices coupled to theplurality of infrastructure components including a first infrastructuremanagement device including: one or more external management ports; oneor more internal link ports; one or more external link ports; a machinereadable storage medium having instructions for facilitating automaticassembly of a network without any user configuration beyond simplenetwork cabling, wherein the facilitating allows the increasing anddecreasing of the size of the system via the simple network cabling; anda processor to execute the instructions, the instructions causing theprocessor to: automatically connect: the one or more external managementports to a management network, the one or more internal link ports ateach of the two or more infrastructure management device via a midplane,and the one or more external link ports to one or more external linkports at a second infrastructure management device within a secondmodular infrastructure via a discovery protocol to form a scalable ring,wherein devices are automatically and selectively added or blocked fromthe ring based on advertised associations with a system manager; andretrieve information from the set of controller area networkmicrocontrollers for a set of bay management network ports, wherein theprocessor performs the automatically connecting with automatic selectionof a ring owner that controls the link ports on the management networkto prevent network loops.
 2. The system of claim 1, wherein the set ofmodular infrastructure components further comprise a set of computedevices, a set of interconnect modules, and a set of storage deviceseach network connected to an infrastructure management device via themidplane.
 3. The system of claim 1, wherein the set of controller areanetwork microcontrollers provide instructions for network requirementsof modular infrastructure bays.
 4. The system of claim 1, wherein theinfrastructure management device constructs a restful informationservices model based on controller area network microcontroller messageinformation.
 5. The system of claim 1, wherein the infrastructuremanagement device communicates with compute modules over a managementnetwork using a Simple Service Discovery Protocol (SSDP).
 6. The systemof claim 1, where the modular infrastructure components communicate toone another using a Link Layer Discovery Protocol (LLDP).
 7. The systemof claim 6, wherein the discovery protocols use an IPv6 link localaddress.
 8. The system of claim 1, wherein the first modularinfrastructure comprises a first frame and the second modularinfrastructure comprises a second frame.
 9. The system of claim 1,wherein the infrastructure management device communicates with theinfrastructure management device within another modular infrastructurethrough the external link ports using network information that includesa link level discovery protocol (LLDP) IPv6 local level cluster IPaddress and an advertised cluster password.
 10. The system of claim 1,wherein a connection between one of the external link ports and anexternal link port in another modular infrastructure is disabled whenthat link port advertise association with a different appliance.
 11. Thesystem of claim 1, wherein loop prevention is provided with automaticring owner selection on the scalable ring formed by connecting multiplemodular infrastructure external link ports in a ring.
 12. Aninfrastructure management device comprising: an external managementport; an external link port; an internal link port; a machine readablestorage medium having instructions; and a processor to execute theinstructions to facilitate automatic assembly of a network without anyuser configuration beyond simple network cabling, wherein thefacilitating allows the increasing and decreasing of the size of thesystem via the simple network cabling to automatically connect; theinfrastructure management device to a management network via theexternal management port, the infrastructure management device to asecond infrastructure management device via the external link port andan external link port at the second infrastructure management deviceusing a discovery protocol and connect the infrastructure managementdevice to a redundant infrastructure management device in the samemodular infrastructure via the internal link port, and retrieveinformation from the set of controller area network microcontrollers fora set of bay management network ports, wherein devices are automaticallyand selectively added or blocked from the ring based on advertisedassociations with a system manager and the processor performs theautomatically connecting with automatic selection of a ring owner thatcontrols the link ports on the management network to prevent networkloops.
 13. The infrastructure management device of claim 12, wherein theinternal link port is on a midplane.
 14. The infrastructure managementdevice of claim 12, wherein connections between the external link portand the internal link port form a scalable ring.
 15. The infrastructuremanagement device of claim 12, wherein set of bay management networkports connect at least one of the following modular infrastructurecomponents: a compute device, an interconnect, or a storage device. 16.A non-transitory computer readable medium comprising instructions thatwhen executed cause a processor to facilitate automatic assembly of anetwork without any user configuration beyond simple network cabling,wherein the facilitating allows the increasing and decreasing of thesize of the system via the simple network cabling, the instructions toautomatically connect: one or more external management ports at one ormore infrastructure management devices within a first modularinfrastructure to a management network, one or more internal link portsof the one or more infrastructure management devices via a midplane, andone or more external link ports at each of the one or moreinfrastructure management devices to one or more external link ports atone or more infrastructure management devices within a second modularinfrastructure via a discovery protocol, wherein devices areautomatically and selectively added or blocked from the ring based onadvertised associations with a system manager; and retrieve bayinformation from a set of controller area network microcontrollers for aset of bay management network ports, wherein the automatic connecting isperformed with automatic selection of a ring owner that controls thelink ports on the management network to prevent network loops.
 17. Thenon-transitory computer readable medium of claim 16, wherein thediscovery protocol comprises a Link Layer Discovery Protocol (LLDP). 18.The non-transitory computer readable medium of claim 17, wherein thediscovery protocols use an IPv6 link local address.
 19. Thenon-transitory computer readable medium of claim 16, wherein the modularinfrastructure management devices are connected via redundant controllerarea network busses.
 20. The non-transitory computer readable medium ofclaim 16, wherein the modular infrastructure management devicescommunicate via a device protocol.